Added support to open remote URLs

For ImageMagick and Imagick (the latter requires ‘allow_url_fopen’ to be enabled).

Author: mcaskill

src/Charcoal/Image/Imagemagick/ImagemagickImage.php

@@ -111,15 +111,19 @@ public function open($source = null)
                 'Source must be a string (file path)'
             );
         }
+
         $source = ($source) ? $source : $this->source();
         $this->resetTmp();
         if (!file_exists($source)) {
-            throw new Exception(
-                sprintf('File "%s" does not exist', $source)
-            );
+            if (null === parse_url($source, PHP_URL_HOST)) {
+                throw new Exception(
+                    sprintf('File "%s" does not exist', $source)
+                );
+            }
         }
-        $tmp = $this->tmp();
-        copy($source, $tmp);
+
+        copy($source, $this->tmp());
+
         return $this;
     }
 
@@ -139,13 +143,16 @@ public function save($target = null)
                 'Target must be a string (file path)'
             );
         }
+
         $target = ($target) ? $target : $this->target();
         if (!is_writable(dirname($target))) {
             throw new Exception(
                 sprintf('Target "%s" is not writable', $target)
             );
         }
+
         copy($this->tmp(), $target);
+
         return $this;
     }
 

src/Charcoal/Image/Imagick/ImagickImage.php

@@ -87,8 +87,15 @@ public function open($source = null)
                 'Source must be a string'
             );
         }
+
         $source = ($source) ? $source : $this->source();
-        $this->imagick()->readImage($source);
+        if (parse_url($source, PHP_URL_HOST)) {
+            $handle = fopen($source, 'rb');
+            $this->imagick()->readImageFile($handle);
+        } else {
+            $this->imagick()->readImage($source);
+        }
+
         return $this;
     }
 
@@ -107,13 +114,13 @@ public function save($target = null)
                 'Target must be a string (file path)'
             );
         }
-        $target = ($target) ? $target : $this->target();
 
+        $target  = ($target) ? $target : $this->target();
         $fileExt = pathinfo($target, PATHINFO_EXTENSION);
 
         $this->imagick()->setImageFormat($fileExt);
-
         $this->imagick()->writeImage($target);
+
         return $this;
     }